CAJ | 학술논문

以氯化锌和氧氧化钠为反应物,中空纤维膜为分散介质,采用双膜分散法制备氧化锌颗粒.研究了两膜组件间距、分散相流速及表面活性剂对颗粒尺寸和形貌的影响.所得产物的SEM和粒度分布分析结果表明:两膜组件间距对颗粒平均尺寸无明显影响;无表面活性剂时,颗粒尺寸随着分散相流速的增大而增大,当流速从10mL/min增大到40mL/min时,平均粒径从307nm增大到476nm;表面活性剂的加入能有效抑制颗粒的生长,且颗粒尺寸随着分散相流速的增大而减小,当分散相流速由20mL/min增至70mL/min时,颗粒平均粒径由182nm减小到45nm.
이록화자화양양화납위반응물,중공섬유막위분산개질,채용쌍막분산법제비양화자과립.연구료량막조건간거、분산상류속급표면활성제대과립척촌화형모적영향.소득산물적SEM화립도분포분석결과표명:량막조건간거대과립평균척촌무명현영향;무표면활성제시,과립척촌수착분산상류속적증대이증대,당류속종10mL/min증대도40mL/min시,평균립경종307nm증대도476nm;표면활성제적가입능유효억제과립적생장,차과립척촌수착분산상류속적증대이감소,당분산상류속유20mL/min증지70mL/min시,과립평균립경유182nm감소도45nm.
Ultrafine zinc oxide particles have been obtained from a solution reaction between ZnCl2 and NaOH using a double hollow fiber membrane as the dispersion medium.The effects of different factors such as mixing distance,flow rate and surfactant were investigated in detail.The results showed that the mixing distance had no significant effect on the mean particle diameter.When there was no surfactant,the mean particle diameter of zinc oxide increased from 307nm to 476nm on increasing the flow rate from 10mL/min to 40mL/min.With added surfactant,the growth of particles was effectively suppressed,and the mean particle diameter decreased from 182nm to 45nm when the flow rate was increased from 20mL/min to 70mL/min.The sizes and morphologies of the particles prepared using the double hollow fiber membrane dispersion technology were characterized by scanning electron microscopy and compared with those of particles prepared by single hollow fiber membrane dispersion technology.